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USER'S
MANUAL

BM857

BM859CF

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Содержание BM857

Страница 1: ...USER S MANUAL BM857 BM859CF ...

Страница 2: ...1000 Volts AC DC and Category IV 600 Volts AC DC mAµA Category III and Category IV 600 Volts AC and 300 Volts DC Category IV safety standard for DMMs was first released in IEC61010 1 2nd Edition in year 2001 and was not adopted as an UL published standard at the time this manual was written Per IEC61010 1 2nd Ed 2001 Measurement Category OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II...

Страница 3: ...er guards of the test leads during measurement Inspect test leads connectors and probes for damaged insulation or exposed metal before using the instrument If any defects are found replace them immediately Do not measure any current that exceeds the current rating of the protection fuse Do not attempt a current measurement to any circuit where the open circuit voltage is above the protection fuse ...

Страница 4: ...nual Caution Risk of electric shock Earth Ground Double Insulation or Reinforced insulation Fuse AC Alternating Current DC Direct Current 2 CENELEC Directives The instruments conform to CENELEC Low voltage directive 73 23 EEC and Electromagnetic compatibility directive 89 336 EEC ...

Страница 5: ...ures 3 Selector to turn the Power On or Off and Select a function 4 Input Jack for 10A 20A for 30sec current and for T2 function 5 Input Jack for all functions EXCEPT current µA mA A and T2 functions 6 Common Ground reference Input Jack for all functions EXCEPT T2 function 7 Input Jack for milli amp micro amp and T2 functions ...

Страница 6: ...m is a good example and the AC true RMS function will only give the AC component reading which is at 43 6 of the total effective DC AC RMS reading DC AC True RMS DC AC True RMS calculates both of the AC and DC components given by the expression when making measurement and can responds accurately to the total effective RMS value regardless of the waveform Distorted waveforms with the presence of DC...

Страница 7: ...and indicating signal spikes during adjustments Analog bar graph is not available in AC DC True RMS Voltage Current modes 4 OPERATION AC Voltage DC Voltage DC AC Voltage Hz Line Level Frequency In AC Voltage press SELECT button momentarily to toggle between AC and dBm In DC Voltage press SELECT button momentarily to toggle between DC and DC AC In mV Voltage press SELECT button momentarily to selec...

Страница 8: ... measure the signal voltage or current level then activate the Hz function in that voltage or current range to automatically get the most appropriate trigger level When activated from voltage function you can also press the RANGE button momentarily to select another trigger level range manually The analog bargraph pointer will point at the selected trigger level range scale 1 2 3 or 4 If the Hz re...

Страница 9: ...ed automatically to the non volatile memory as power up default Press 500000 button momentarily to toggle between 5 full digits and 6 full digits Hz readings Note Unlike the Line Level Frequency measuring function as previously stated this Logic Level Frequency function is set only at the highest input sensitivity to measure digital type electronic signals ...

Страница 10: ... as power up default Press T1 T2 RANGE button momentarily to select T1 T2 or T1 T2 readings Note Insert the banana plug K type temperature bead probe Bkp60 standard accessory x 1 with correct polarities Dual channels T1 T2 readings require 2 probes You can also use a plug adapter Bkb32 Optional purchase with banana pins to K type socket to adapt other standard K type mini plug temperature probes ...

Страница 11: ... as power up default Continuity function is convenient for checking wiring connections and operation of switches A continuous beep tone indicates a complete wire CAUTION Using resistance or continuity function in a live circuit will produce false results and may damage the meter In many cases the suspected component must be disconnected from the circuit to obtain an accurate reading ...

Страница 12: ...ould be discharged through an appropriate resistance load Note Normal forward voltage drop forward biased for a good silicon diode is between 0 400V to 0 900V A reading higher than that indicates a leaky diode defective A zero reading indicates a shorted diode defective An OL indicates an open diode defective Reverse the test leads connections reverse biased across the diode The digital display sh...

Страница 13: ...A current value to alert the user Warning When measuring a 3 phase system special attention should be taken to the phase to phase voltage which is significantly higher than the phase to earth voltage To avoid exceeding the voltage rating of the protection fuse s accidentally always consider the phase to phase voltage as the working voltage for the protection fuse s RS232C PC computer interface cap...

Страница 14: ...ST capture mode Auto Power Off feature will be disabled automatically in this mode Relative Zero mode Relative Zero allows the user to offset the meter consecutive measurements with the displaying reading as the reference value Practically MAX MIN recording feature readings can also be set as relative reference value Press the button momentarily to activate and to exit Relative Zero mode 500000 hi...

Страница 15: ...fe after approximately 17 minutes of no activities Activities are specified as 1 Rotary switch or push button operations and 2 Significant measuring readings of above 10 of range or non OL Ω readings In other words the meter will intelligently avoid entering the APO mode when it is under normal measurements To wake up the meter from APO press the RECORD button momentarily or turn the rotary switch...

Страница 16: ...tage transient caused by lightning or switching surge to the system by accident or abnormal conditions of operation the series fusible resistors will be blown off become high impedance like fuses to protect the user and the instrument Most measuring functions through this terminal will then be open circuit The series fusible resistors and the spark gaps should then be replaced by qualified technic...

Страница 17: ...ic of below 0 01 second at beyond 2 5A This protection characteristic also matches our meter nicely Battery replacement for models with battery access door Loosen the 2 screws from the battery access door of the case bottom Lift the battery access door and thus the battery compartment up Replace the battery Re fasten the screws Fuse replacement and also Battery replacement for splash proof version...

Страница 18: ...repaid to BRYMEN TECHNOLOGY CORPORATION BRYMEN assumes no risk for damage in transit BRYMEN will at its option repair or replace the defective product free of charge However if BRYMEN determines that the failure was caused by misused altered neglected or damaged by accident or abnormal conditions of operation or handling you will be billed for the repair THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU O...

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